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<head>
    <meta charset="UTF-8">
    <title>操作</title>
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<body>
    <h2>操作(方法)</h2>
    <a href="event/ch01.html">事件</a>
    <a href="event/ch02.html">打开关闭事件</a>
    <h3>属性操作</h3>
    <a href="attr1/ch01.html">属性1</a>
    <h3>文档操作</h3>
    <a href="doc.html">属性1</a>
</body>
</html>